Stock 7 Bolt Power Rating.

[SlowWhite]

So I did some searching just prior to dynoing at elite asking about the potential of a 7 bolt Block, etc.

The fastest 7 bolt DSMR I came up with was Eclipsed20G over on DSMLINK Forums.


He posted 11.6@128mph - FWD So I PM'd him and asked about his set up and what not.


This is his reply, and also a fallow up after NOPI's this past weekend.

He upped his new personal Best to 11.1@129.95mph

-Stock 7bolt Motor
-Stock Intake manifold
-Stock Intake
-T4 Turbo Set up.
-Car Weights just over 2700lbs


Well on his Sencond Pass he descided to try 50 shot of Nitrous on top of BOOST (which was 30psi) And blew his motor - He said the way his run was shaping up before his Motor blew, it would have been a 10 sec pass.

He has no Official Dyno numbers at 30psi - but last year he mentioned he made 439fwhp at 25psi with his set up.

And since Andy Nash has run 129mph Traps and Dyno'd 508whp when he did it I have to imagine that he was somewhere around that numbers.

I asked him about reliability and I'm waiting to hear back. (he'd mentioned something about doing really well in the Points this year so I imagine he must compete in some sort of Circuit. And since the Summer is almost over I'd imagine he's done quite a few pass's at those HP levels with his car.

[timwakefieldjr]

holy crap that is impressive numbers. NOS always does the darn motors in hmmmm... oh well.. Does he plan to build another 7bolt to replace it or go to 6 bolt? What kind of internals did the 7 bolt have (I assume none since it says stock)?

-Tim

[niterydr]

your motor is still gonna pop fool! :razz2:

[SlowWhite]

Originally posted by timwakefieldjr@Jul 27 2004, 02:32 PM
holy crap that is impressive numbers. NOS always does the darn motors in hmmmm... oh well.. Does he plan to build another 7bolt to replace it or go to 6 bolt? What kind of internals did the 7 bolt have (I assume none since it says stock)?

-Tim
It was a completely stock motor except for:
-HKS 272's
-ARP Head Studs

everything else is as it came from the factor. As for his next motor he's thinking he's going to be going Built 6 bolt.

[fmicmatt]

Originally posted by niterydr@Jul 27 2004, 06:18 PM
your motor is still gonna pop fool! :razz2:
I agree......

Todd Hayashi........one of the 2G DSM front runners back in the day built 3(ea)7-bolt engines in a row each with a "NEW Crank-Walk Fix" and NONE of them made it past the 100mile mark without crank walk.

It will pop!

Its not a question of if....just when.

The only thing you can do is have a preped 6-bolt ready to go in.

With my old set-up I put down 367fwhp on 26psi w/race gas....12.42@116mph............and a week later the crank walked with 113000miles on it.

My old set-up conisted of a stock 7-bolt bottom and top, S20G, 720s, FMIC, SAFC, ACT 2600/6-puck, and Supra Pump.

7-Bolts' can handle the power just the same as a 6-Bolt..........they just don't last that long.

There is no SAFE horsepower level for a 7-Bolt crank.........it will walk @ stock and it will walk @ 450whp.

HP is not a factor in Crankwalk.

(My beliefs only)-Matt

[SlowWhite]

Well I have 120K miles on my motor and all but 22K of it have been over 320whp and abused every day of it's life.

But I'll also mention my motor is a rebuilt 99, assembled by the dealership back in 99. So who knows?

[Enes]

i'd be currious to find out how in spec you are..
have qpr or elite do the crank walk check on it and tell you how much your crank moves ;)

i did mine and i was surprised none the less... we'lll just have to see how much more it will last with the 2600# pp in there..

-E

[SlowWhite]

ya I'll get right on that. :bs:


I'm not worried. If the motor walks I'll just swap to 6bolt.. Although as far as I remember there have been more case's of 6bolts walking here in MN then there have been as far as 7bolts go?

But no-ones made a CW claim in about 2 years. So who knows. - I've run a CM stg 3 clutch since the first week of owning the car and the last 10K or so have been with the ACT2600.

[Enes]

well thing is i was just currious... because mine is still within the specs.. top part of it but still within... i haven't checked it before but i will be checking it every so often... just to keep an eye on it, not a big deal let it crank walk, i already have a 6bolt block and everything necessary for me to do the swap.. just sitting until i get some money i can put toward the engine then i will start ordering parts and building one..

_E

[Raptor]

Actually, remeber that green 2G talon at your house last fall for months Brian? It walked, it is getting a 6bolt now at the shop. I would worry less about it walking than the rods not being able to handle those numbers for long. The difference between 6 and 7 bolt rods is more than a little bit. At minimum, I am sure they will flex under load and potentially keep getting weaker.

Those are good numbers though Brian, glad to hear it is making some respectable power now. Hopefully it will hang together long enough to enjoy it for a while.